TODAY APR25
TEMPERATURE52
HUMIDITY89
PRESSURE100980
WIND COND.150 14.8
  • 5845Fri100%70%
  • 5645Sat90%80%
  • 5540Sun90%
  • 5439Mon
  • 5740Tue
daynightWeather update from Arlington Municipal Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Lake Cassidy for August is 63.3 degrees
  • The lowest monthly average temperature in Lake Cassidy for December is 37.6 degrees
  • The most monthly precipitation in Lake Cassidy occurs in November with 4 inches
  • The air quality index in Lake Cassidy is 43% better than the national average
  • The pollution index in Lake Cassidy is 479% worse than the national average

Compare Lake Cassidy, WA Weather

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      Lake Cassidy Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January33°F46°F39°F3.0"
      February34°F50°F41°F1.7"
      March37°F54°F45°F3.4"
      April40°F59°F48°F2.0"
      May45°F65°F54°F2.4"
      June49°F70°F59°F1.9"
      July52°F77°F63°F1.3"
      August52°F78°F63°F1.4"
      September49°F71°F58°F2.4"
      October43°F60°F50°F3.4"
      November37°F52°F44°F4.0"
      December32°F44°F38°F3.1"

      Lake Cassidy air quality index & pollution index

      In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
      IndexLake CassidyWashingtonNational
      Air quality index243642
      Pollution index15,778,9004,541,8502,726,193

      Lake Cassidy air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality361
      Days with moderate air quality4
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Lake Cassidy air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.270%
      Carbon Tetrachloride0.040%
      Lead0.160%
      Mercury0.003%

      Average monthly Lake Cassidy temperature with heat index

      Lake Cassidy monthly precipitation with daily maximum

      Lake Cassidy monthly snow depth with daily maximum

      Lake Cassidy monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Granite Falls, WA3,9612452.0%
      Lochsloy, WA2,9912452.0%
      North Marysville, WA1382452.0%
      Langley, WA1,2012452.0%
      Warm Beach, WA2,9342452.0%
      Lake Cassidy, WA2,8542452.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      El Paso, IL2,8544412.0%
      Mountain Iron, MN2,8543530.0%
      Clayton, AL2,8533530.0%
      Davis, OK2,8534314.0%
      Fayetteville, PA2,8553628.0%
      Lake Cassidy, WA2,8542452.0%
      Source: The Lake Cassidy, WA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.